The touchmove event's coordinates are always relative to the view in which the initial touch occurred.
You need to convert the points in the image, to the points in the containing view, thankfully Titanium provides a helper method for that: convertPointToView
I'm not sure exactly what you are trying to accomplish but here is an example of using this function, apply it to what you need to do:
$.accueil.addEventListener("touchmove", function(e){
// If the points are in the image, convert them to the containing view
if(e.source == $.button_way) {
var imageViewPoint = { x e.x, y : e.y };
// Translate from button_way to accueil point of view
var accueilViewPoint = $.button_way.convertPointToView(imageViewPoint, $.accueil);
Ti.API.info(accueilViewPoint);
} else {
// Otherwise just leave them
var accueilViewPoint = { x e.x, y : e.y };
Ti.API.info(accueilViewPoint);
}
});